Directions

Preheat oven to 350°F. Coat a pie plate or 9-inch square glass baking pan with cooking spray, and set aside.

In a large mixing bowl, combine all of the ingredients except 1 Tbsp of Parmigiano-Reggiano cheese. Mix well. Pour the mixture into the prepared pie plate.

Bake at 350F for 45-50 minutes, or until the top is golden brown and a toothpick inserted into the center comes out clean. Remove pie from the oven, sprinkle on the remaining 1 tablespoon of cheese, and let sit for at least 10 minutes, or up to an hour, before serving.

Serve at room temperature. Can be made up to 2 days ahead; store in the refrigerator.